JPH0644853Y2 - Corner reinforcement frame - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a corner reinforcing frame using a paper corner angle reinforcing material for protecting a corner portion of a packaged product.

[Prior Art] In order to protect the corners from damage caused by shocks that occur when stacking, transporting, and transporting flat products such as flat paper and flat products such as thin metal plates, Corner angles are used.

As a conventionally proposed prior art, for example, in Japanese Utility Model Laid-Open No. 54-102467, when connecting hollow angles having an L-shaped cross-section, one horizontal portion is provided with a cutout portion and the other horizontal portion is provided. There is disclosed a hollow cushioning material that is made to polymerize by inserting a hollow cushioning material, and the insertion piece and the insertion and joining rising piece are polymerized in the vertical portion. However, two hollow angles are inserted by utilizing the hollow portion. Are combined by.

In JP-A-57-131459, a thermosetting resin layer is provided on at least one surface of a paper angle having an L-shaped cross section in which a plurality of strip-shaped papers are folded in two around a folding line in the longitudinal direction and laminated. The paper angle is characterized in that the thermosetting resin is applied to the angle surface to improve mechanical strength and moisture resistance, but it is an angle that protects the two side surfaces, and as it is, the corner surface is not protected on the three sides. It cannot be done.

Japanese Patent Laid-Open No. 58-125170 discloses a corner cushioning material having a corner mount at both ends, which is formed by bending a single rectangular mount and easily assembling the blank sheet without any bonding process. However, since the mount is folded and assembled, it is difficult to use thick and strong paper such as laminated paper, and there are strength restrictions. In addition to the paper corner angles targeted by the present invention, there are also corner angles made of Styrofoam, etc.
Since it has completely different physical properties and workability from paper, it was excluded from the target.

As a paper corner angle that is actually used at present, for example, a plurality of strips of paper are folded in two around a bending line in the longitudinal direction, bent into an L-shaped cross section with an angle of 90 °, and laminated L-shaped. Using the laminated paper, two L-shaped laminated papers are arranged so as to be orthogonal to each other and unnecessary portions are cut out, then the end faces of the laminated paper are butted together, stitch metal fittings or adhesive tape, double-sided tape For example, two L-shaped laminated papers are joined together to form a corner angle, or a flat plate of another laminated paper is pasted on the above L-shaped laminated paper with glue, In some cases, the corners of the flat laminated paper are spliced together with adhesive tape.

However, fixing the two laminated paper sheets with the stitch metal fittings or the adhesive tape to form the corner angle is troublesome at the time of packing, and the materials such as the stitch metal fittings and the adhesive tape have to be prepared separately. However, the tape may come off, and the stitch metal may easily damage the paper.In particular, after the corners are protected by the corner angles, the product may rotate in the automatic wrapping machine such as shrink wrap and stretch wrap. However, since it is wrapped and wrapped, a corner angle reinforcing material that can easily and stably fix the corners has been demanded.

[Problems to be Solved by the Invention] The present invention has been made to solve the above-mentioned problems, and when assembling a paper corner angle, it is not necessary to use stitch metal fittings or adhesive tape, and it is an L-shape. To provide a corner reinforcing frame using an excellent corner angle reinforcing material which can be easily assembled from a pattern laminated paper, can prevent the corners of the packed product from being damaged, can be reused, and has a beautiful appearance. With the goal.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a method in which a plurality of strip-shaped paper sheets are folded in two around a folding line in the longitudinal direction and laminated and formed into a three-sided L-shape, A crease having a U-shaped cross section is formed in the paper on one side about the bending line in the longitudinal direction at a right angle to the longitudinal direction, and a cut groove having the U-shaped cross section is formed on the other side. Radial cutouts with an angle of 90 degrees are formed starting from the end of the groove, and convex and concave pieces are provided on the end faces of the two opposite sides forming the cutout, respectively, and the cutout of the U-shaped cross section is formed. Bend inward 90 degrees around the groove, and use corner angle reinforcements made by fitting the above-mentioned opposing convex and concave pieces, facing each other as a set of two and both ends of those reinforcements. The faces are abutted at right angles to each other, and one of the abutted end faces A convex portion,
The corner reinforcing frame is characterized in that a concave portion into which this is fitted is provided on the other side and both angle members are integrally connected to be assembled into a square shape.

The corner angle reinforcing material used in the present invention can be manufactured as follows.

After applying a thermoplastic resin between a plurality of paper layers of paper or paperboard, set it in a pressure device having a molding frame that can be pressure-molded into an L-shape, pressurize and stack in an L-shape, After drying at room temperature,
Obtain an L-shaped laminated paper. Thereafter, a punching blade incorporated in the pressurizing device is provided with a predetermined cutout portion on one side of the L-shaped laminated paper sheet, and the other laminated paper sheet has a U-shape adjacent to the base point of the cutout portion. A corner angle reinforcing material can be obtained by carving the kerfs with a disk saw or the like. There is no limitation on the paper and paperboard used, but it is preferable to use various paperboards having a thickness of 0.2 to 1 mm.

[Examples] The present invention will be specifically described below with reference to Examples.

One 0.3 mm thick corrugated cardboard liner cardboard is used as the front side, and four unbleached paperboards with a thickness of 1 mm are coated on the back side with a 1: 1 mixed emulsion of polyvinyl alcohol and vinyl acetate as an adhesive between the paper layers. And set it in a room temperature press, then
From the longitudinal centerline (folding line) 2 of the paperboard shown in FIGS. A and 3, the paperboard is folded in two, pressed and laminated in an L-shape, and dried at room temperature to obtain an L-shaped cross-section laminated paper. Then, with the punching blade embedded in the wooden mold made of plywood set in the press,
As shown in FIG. 2A, the paper is bent in a radial direction at an angle of 90 ° with a predetermined position of the folding line 2 of the paper as a base point, and a notch 6 provided with a convex piece 3 and a concave piece 4 is provided on the radial opposite sides. . On the other hand, on the other side of the L-shaped laminated paper, at the same position as shown in FIG. 2A, a kerf 5 having a U-shaped cross section shown in FIG. The corner angle reinforcement material can be obtained. A right side view of FIG. 2A is shown in FIG. The end of the cut groove 5 having a U-shaped cross section is in contact with the base point of the cutout 6 on the bending line 2.

To assemble a laminated paper having a notch with an L-shaped cross section and a U-shaped kerf for folding into a corner angle, see FIG.
By bending inward 90 ° around the U-shaped kerf 5 shown in FIG. 2 and fitting the trapezoidal convex pieces 3 and concave pieces 4 which are provided on the two sides forming the notch 6 and are opposed to each other, It is fixed as a corner angle that can protect the upper surface of the corner shown in FIG. The depth of the U-shaped kerf can be appropriately changed depending on the thickness of the paper.

The shape of the convex piece and the concave piece may be any shape as long as they cannot be pulled out after fitting, and may be a trapezoid, a triangle, a circle, an ellipse or the like.

As described above, there is an advantage that the corner portion can be easily assembled to the corner angle by one-touch at the packing site of the cube-shaped product without requiring any additional adhesive coupling means.

FIG. 4 shows the use of the corner reinforcing frame of the present invention. That is, as shown in FIG. 5, a pair of two corner angle reinforcing members 1A and 1B face each other,
Both ends 7a and 7b of the reinforcing members are abutted so as to form a right angle with each other, and a convex piece 3 is provided on one of the abutted end faces.
On the other hand, a concave piece 4 to which this is fitted is provided, and both angles are integrally connected to assemble into a square shape. This is fitted into the corners of the top or bottom of the packaged product (cardboard box 6) and used as shown in FIG.

[Effects of the Invention] As described above, by using the corner angle reinforcing material of the present invention to protect the corner surface of a cardboard box or a flat product such as paper, iron, aluminum or copper, the following effects are obtained. Can be raised.

(B) The corner angle reinforcement made of paper makes it easy to assemble the corner angles at the packing site and protect the three corners.

(B) The stitch metal fittings and adhesive tape required for assembling conventional paper corner angles are no longer required, and the corners can be fixed only by the corner angles, making it an automatic packaging machine for shrink wrapping, stretch wrapping, etc. Can be used stably when applied.

(C) In a corrugated cardboard box, etc., the corners of the box are reinforced at the four ridges that connect the corners, so the strength of the box can be increased, the number of stacking steps can be increased, and the carrying capacity can be increased. it can.

(D) In the case of plain paper and flat metal products, the vertical direction including the upper and lower corners is reinforced, so that there is a significant effect in preventing the collapse of the pallet load.

(E) Conventional stitch metal fittings and corner angle reinforcements fixed with adhesive tape cannot be reused after unpacking, but the one of the present invention can be reused and has a good external appearance.

(F) The present invention has two corner angle reinforcements 1A and 1B.
Since it is integrally connected in a square shape by using, the whole can be used as one reinforcing material, so mounting work on products and packing work can be done easily, and each member can be stored It is easy to use because it can be separated.

(G) Since it is formed in a quadrangular shape, when it is used by fitting it on the upper surface or the lower surface of a rectangular parallelepiped-shaped product, the corners of the product can be protected in any direction. Therefore, it is possible to reliably protect the product with a small amount of material.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state where a corner angle reinforcing member used in the present invention is assembled, FIG. 2A is a perspective view showing a state before assembling, and FIG. 2B is a sectional view of a U-shaped groove. Third
FIG. 4 is a right side view of FIG. 2A, and FIG. 4 shows a use state of the corner reinforcing frame of the present invention. FIG. 5 is an exploded explanatory view of the same corner reinforcing frame. 1 ... Corner angle reinforcement, 2 ... Bending line, 3
...... Convex piece, 4 ... Concave piece, 5 ... U-shaped kerf, 6 ... Cardboard box, 7 ... Flat product, 8 ... Pallet.

Claims (1)

[Scope of utility model registration request] 1. A plurality of strips of paper are folded in two around a folding line (2) in the longitudinal direction to be laminated and formed into an L-shaped cross section, and one of them is centered around the folding line in the longitudinal direction of the paper. The paper on the side of is cut with a kerf (5) having a U-shaped cross section at right angles to the longitudinal direction, and the paper on the other side has an angle of 90 ° from the end of the kerf of the U-shaped section. Radial notches (6)
And a convex piece (3) and a concave piece (4) are respectively provided on the end faces of the two opposite sides forming the cutout portion, and are bent inward 90 degrees about the U-shaped cross section as a center. , Using the corner angle reinforcing members formed by fitting the facing convex pieces and concave pieces, facing each other as a set of two pieces, and abutting both end surfaces of these reinforcing materials at right angles to each other, A corner reinforcing frame is characterized in that a convex portion is provided on one of the butted end faces and a concave portion to which the convex portion is fitted is provided on the other end face, and both angle members are integrally connected to be assembled into a square shape.